Drawing-board.



IINTTED STnTns aTnarT @Trina OLOOTT I-IASKELL, OF SAN RAFAEL,CALIFORNIA.

SPECIFICATION forming part of LettersPatent No. 678,562, dated July 16,1901.

Application filed April 16, 1901. Serial No. 56,102. (No model.)

To ctZZzl/wm t may concern:

Be itknown that I, OLcoTT HAsKnLL, a citizen of the United States,residing at San Rafael, county of Marin, State of California,haveinvented certain new and useful Improvementsin Drawing-Boards; and I dohereby declare the following to be a full, clear, and eX- actdescription of the same.

My invention relates to drawing-boards, and especially to those which byreason of their adaptation to carry the instruments of a drawing-kit andtheir general convenience and cheapness are intended for use inmanualtraining schools and class-rooms generally.

My invention lies in certain improvements which may be stated, briefly,at this point to consist of a novel clamp and gage for thedrawing-paper, novel means on the back of the board for housing andcarrying the T- square and for securely seating and holding thetriangles, adjustable hinged legs for supporting the board andregulating its slope,

'and novel means for conveniently holding the board in a verticalposition for displaying completed drawings or disposing of said boardwhen not in use.

These several improvements have for their object, in addition to thosedesirable results which flow specifically from each, the general resultof providing an economical,serviceable, and attractive drawing-board ofthis class.

Referring to the accompanying drawings, Figure l is a front elevation ofmy drawingboard, a portion of the clamp-strip U being broken away toshow how the sheet of' paper P fits under said strip and is registeredagainst the gage -lip c. Fig. 2 is an elevation of my drawing-board fromthe back. Fig. 3 is an end elevation of same, showing its position onthe bench or table. Fig. 4 is an enlarged broken detail of one corner ofthe board taken from the upper edge. Fig. 5 is an enlargedcross-section, partly broken. Fig. 6 is a detail section of amodification of the T-square sheath.

A is the board, made of suitable material and stiffened by a back cleatB at each end. These cleats are somewhat heavier than is usual for apurpose presently to be described. Incidentally, however, they make astiffer board and enable me to carry out the preferable construction ofnailing the board to them from the front instead of passing the nailsthrough the cleats into the board.

At the top of the board along its face is a strip C of metal or hardwood. It is secured by means of thumb-nuts D, one near each end, eachnut being threaded upon as crewbolt E, preferably a flat-headedmachine-bolt, which is screwed from the back through cleat B and throughthe board and receives upon its projecting end said strip C, which has ahole made in it to fit freely upon said bolt, so that the'strip may moveeasily thereon.

The strip C is spring-controlled by means of suitably-disposed springs.I have here shown one arrangement by placing spiral springs G around thebolts under the strip, thus normally holding it away from the face ofthe board and adapting it to receive under it the sheet or sheets ofdrawing-paper P, which may then be clamped by turning down thethumb-nuts and forcing the strip down upon them. This strip C thus formsa clamp along the upper edge of the board, whereby the drawing-paper, ora number of sheets of said paper, may be readily placed upon the boardand securely held without marking, pricking, or marring the paper in anymanner; but this clamping-strip C is made to serve another function, towit, that of a gage or stop by which the paper may bc quickly` andaccurately registered with its edges parallel to those of the board.This is effected by providing the strip C with a shoulder or rabbet,forming a lip c, which projects downwardly over the top edge of theboard. The paper P, when slipped under the clamping-strip, is pushedupwardly until its top edge is stopped by the lip c, and in thisposition it will lie with its edges square with those of the board, andit is then clamped.

His the casein which the T-square I is held and housed. It consists of astrip or strips secured to the back of the board by nailing orotherwise,with the ends preferably slipped under the edges of cleats B.When a single strip is used, as shown in Figs. 2 and 5, it is groovedout to form a channel h of' dimens sions adapted to receive the leg orblade of the T-square, and when said strip H is secured to the boardthis channel h forms a case or sheath, entrance to which is had fromeither end through openings l), formed in the IOO cleats B in linetherewith and parallel with the plane of the board. The T-square I maybe inserted from either end, its leg or blade entering and lying in thissheath and its head or hilt lying` against and parallel with the cleatB. When the sheath is composed of two strips, as shown in Fig. 6, thechannel for the leg of the T-square is formed by the flanged edges ofsaid strips. In order to hold the T-square in its case against anyliability to drop or to be shaken out, there is in this sheath africtional projection J, formed in any suitable manner and locatedeither in the board, as in Fig. 6, or in the strip H, Fig. 5. Inpractice I have found that the oval head of a brass upholstery-nailserves the purpose well and that it is best inserted in the strip I-I.This projection, in conjunction with the spring of the strip H itself,causes sufficient friction on the leg or blade of the T-square to holdit in place without interfering with its insertion and removal. Thissame strip II, together with the cleats B, and suitable frictionalprojections form holders for the two triangles K and K', whereby thelatter are disposed of in a convenient and accessible place.

The edges of the cleats B are grooved or undercut, as shown at h', andthe edge ot' strip H is similarly grooved or undercut, as shown at h. Inlthe board are placed the projections L, which may be made in anysuitable manner, preferably by the heads of brass upholstery-nails. Thetriangles slip into the grooves h and h', and springing over theslightly-projecting nail-heads L finally fit their holes 7c and k' overthese heads, thereupon lying flat in their places, with the nailheadsengaging the holes. To remove either triangle, it is only necessary tospring it up slightly over the nail-head and then slip it out ot thegrooves.

The board is provided with two adjustable legs M, which are adapted toslip into corresponding holes bored vertically through the top of thetable or bench N, upon which said board is to be used. These legs arehinged to the board, working upon pivots at m in the cleats B, withrubber, leather, or other washers m', whereby the legs move noiselesslyand the joints are rendered stift' enough to hold the legs in anyposition to which they are set. Milled -head stop -nuts m2 are threadedon the legs and are adapted to define and limit the insertion of thelegs in the desk or bench holes, thereby regulating the slope of theboard. To prevent the nuts from accidentally turning oft from the legsand getting lost, .the thread on the legs a short distance from the endmay be upset, as shown at m3.

The board may when out of use or for the purpose of convenientlyexhibiting completed drawings be held in a vertical position byfastening two vertical dowels or pins O at the rear of the table orbench and boring holes b2 in the lower end of cleats B and setting theboard upon the pins O, which enter said holes. l

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-- l. A drawing-board having aspring-controlled clamping-strip adapted to hold the drawing-paper, saidstrip having a lip forming a stop for the upper edge of the insertedpaper whereby said paper is registered square with the board,screw-bolts upon which said strip is fitted and guided, and thu uib-nutson the bolts acting on said strip.

2. A drawing-board having along the upper edge of its face, aspring-controlled clampingstrip adapted to hold the drawingpaper, saidstrip havinga lip projecting downwardly over the upper edge of the boardand forming a stop for the upper edge of the inserted paper whereby saidpaper is registered square with the board, screw-bolts upon which saidstrip is fitted and guided, and thumb-nuts on the bolts acting on saidstrip.

3. A drawing-board having on its back a channeled strip forming withsaid board a sheath for the reception of the leg or blade of theT-square and a frictional projection within said sheath, to hold saidleg or blade.

4. A drawing-board having on its back a channeled springy strip formingwith said board a sheath for the reception of the leg or blade of theT-square and a frictional projection extending from said strip into thesheath to hold said leg or blade.

5. A drawing-board having on its back at each end a stiffening-cleat,provided with a transverse opening parallel'with the plane of the board,and a strip secured to the back of the board between said cleats andhaving on its under face a channel in line with the cleatopenings, andforming with said board a sheath, to receive the leg or blade of the T-square entered through the cleat-openings.

6. A drawing-board having on its back at each end a stitfening-cleat,provided with a transverse opening parallel with the plane of the board,and a strip secured to the back of the board between said cleats andhaving a channel in line with the cleat-openings, said strip formingwith said board a sheath, to receive the leg or blade of the T-squareentered through the cleat-openings, and a frictional projection withinsaid sheath, to hold said leg or blade.

7. A drawing-board having on its back at each end a stiiening-cleat,provided with a transverse opening parallel with the plane of the board,and a springy strip secured to the back of the board between said cleatsand having a channel in line with the cleat-openings, and forming withsaid board a sheath, to receive the leg or blade of the T-square enteredthrough the cleat-openings, and a frictional projection extending fromsaid strip into the sheath to hold said leg or blade.

S. A drawing-board having on its back ICO IIG

stifteningcleats at each end, with grooved or undercut inner edges, astrip on the back of said board extending between said cleats and havinga grooved or undercut edge, and frictioual projections in the back 0fthe board adapted to engage the holes in the drawingtriangles and withthe undercut edges of the cleats and strip which engage the edges of thetriangles, forming a means for holding and carrying said triangles.

9. A drawing-board having on its back stifening-cleats at each end withgrooved or undercut inner edges and transverse openings parallel withthe plane of the board, a channeled strip on the back of the boardbetween the cleats and forming with said board a sheath for the leg orblade of the T-square entered through the cleat-openings, said channeledstriphavingagrooved orundercut edge, a frictional projection in saidsheath to hold the leg or blade of the T-square, and frictionalprojections in the back of the board adapted to engage the holes in thedrawingtriangles and with the undercut edges of the cleats and stripwhich engage the edges of the triangles, forming a nieans for holdingand carrying said triangles.

l0. A drawing-board having hinged to its back a pair of legs,screw-threaded, and itted with nuts, to adjustably limit their insertionin sockets, whereby the slope of the board may be regulated.

l1. A drawing-board having hinged to its back a pair of legs,screw-threaded and fitted with nuts, to adjustably lirnit theirinsertion in sockets, whereby the slope of the board may be regulated,said legs having washers at their hinged joints adapted to hold them tothe position in which they are placed.

l2. A drawingboard having stitteningcleats on its back at each end, saidcleats having holes or sockets in their lower ends adapted to fit overfixed pins, to hold the board when not in use.

In witness whereof I have hereunto set my hand.

. OLCOTT HASKELL. Witnesses:

WALTER F. VANE, D. B. RICHARDS.

